Spinach has a high nutritional value and has a large market, but spinach is hi and cool, and belongs to seasonal vegetables in winter and spring. In summer, the cultivation is easy to pull vines, and the commercial nature is poor, and it is not easy to succeed, resulting in a shortage of summer spinach market. How can spinach be cultivated in summer?
Soil disinfection should be strictly summer spinach at the seedling stage is prone to blight, damping-off disease, resulting in dead seedlings broken ridge, so soil disinfection must be carried out by: 2-3 days before spinach sowing, per square meter Mixture of Wufu (70% pentachloronitrobenzene and 50% Formamie 1:1 mixture) or 50% seed dressing double powder 7g, 50% carbendazim, 50% thiophanate, 5th generation mixture (70% pentachloronitro Benzene was mixed with 50% Zelene 1:1, 8% of 8-10 grams of powder, and 10-15 kg of dry fine soil was blended into the soil. Before the application, the bottom water of the seedbed shall be poured. After the water seeps, take 1/3 of the soil and spread it on the surface of the bed, then sow, and then cover it with 2/3 of the soil.
Variety selection should be careful about the hot summer weather, high temperature and high humidity, so we should choose good heat resistance, strong varieties of disease resistance.
Manure application to decompose the summer vegetable field must be fully cooked organic fertilizer. Summer spinach has a short growth period and can be used as base fertilizer. The amount of mu is 600-700 kg, which is suitable for spreading. Combine with soil preparation, deep-dip about 30 centimeters, smashed and smashed to facilitate spinach root growth. The manure must be applied before the site preparation and therefore can be performed together with soil disinfection.
Cultivation methods should be suitable for summer spinach ridge cultivation method is best to use to ensure that the drought can be poured, wolfberry can row. The ridge distance is about 90 cm, the ridge height is about 10-15 cm, and 4-5 rows of spinach are planted on top of the ridge.
Low-temperature germination Fine seeding Summer spinach seeds have a low germination rate during the high-temperature season, typically only about 20%. Direct seeding with dry seeds requires an increase of 3-5 times the amount used. If low-temperature germination treatment is carried out, both the amount of seeds used and the emergence of seedlings can be ensured. The method is: soak the seed with water for 2 hours, wrap the seed with gauze, hang it on the surface of the deep well for 20-30 centimeters, and wash it with well water once or twice a day. Seed can be sowed when the seed is white in 3-5 days. Conditions can also be used low temperature germination refrigerator.
Emergence is the key to sowing seeds of dew after sowing, about 4-5 days can emerge. If there is a lack of seedlings and ridges, they should be planted in time.
It is better to shading the spinach in the early stage. Summer spinach has a high temperature in the early growth period. The light is very strong. Because the spinach itself is not resistant to high temperature and light, it is best to use shading measures in the early stage of growth. You can use the winter vegetable scaffold without removing the membrane. Cover shade net.
Fertilizer management should be appropriate after spinach emergence according to the soil water conditions appropriate to water, often to keep the ground moist, in the four true leaves to the regimental period, combined with watering acres topdressing 30 kg of nitrogen fertilizer 2-3 times. After entering the vigorous growth period, potassium dihydrogen phosphate may also be sprayed on the leaves to promote spinach growth.
To prevent and treat pests, timely spinach development in the summer, prone to downy mildew, virus disease and aphids, leaf miners, beet armyworm and other pests. Control methods:
1Prevention of downy mildew can be used 72.2% Prec 600-800 times liquid, 64% antivirus WP wettable powder 500 times, Navis Mn Zn wettable powder 500 times alternately, 7-8 days, continuous spray 2 3 times.
2 prevention and treatment of viral diseases can be controlled by 1.5% plant disease, Ling Lian 1000 times liquid. Aphids can also be the route of transmission of the disease, and imidacloprid, avermectin, etc. can be used to prevent warts.
3 Control of leaf miner, cotton bollworm, beet armyworm and other available 50% phoxim 1000-1500 times liquid, 90% trichlorfon crystal spray.
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